v3.21.2

Summary of Significant Accounting Policies (Tables)

6 Months Ended

Jun. 30, 2021

Summary of Significant Accounting Policies

Schedule of roll forward of the allowance for doubtful accounts

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​	​	​	​	​	​	​
​	​	Six Months Ended
​	​	June 30, 2021		​	June 30, 2020
Allowance for doubtful accounts, beginning of period	​	$	27,162	​	$	2,467
Bad debt expense	​		34,976	​	​	16,872
Allowance for doubtful accounts, end of period	​	$	62,138	​	$	19,339

Schedule of estimated useful lives of property and equipment

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​	​	​
​	​	Useful Lives (in years)
Vehicles		5-10
Equipment		5-7
Buildings		15
Leasehold improvements		5
Office equipment		5-7

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